Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: Niko on January 15, 2017, 05:35:33 PM

Title: Circlip and piston removal ...master cylinder front brake
Post by: Niko on January 15, 2017, 05:35:33 PM
Hi....I've dug down to my circlip...or what's left of it.
Any tips for getting it out. It won't budge if I try to prize it...the holes and lugs are buggered,

Cheers


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Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: mike the bike on January 15, 2017, 05:43:34 PM
I once used a small screwdriver,  sharpened it up one side, like a chisel.   It weren't easy though.   If only they were made of stainless we wouldn't have all this bother.
Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: Niko on January 16, 2017, 08:34:31 AM
Cheers Mike....I will have a poke around


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Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: Seabeowner on January 16, 2017, 09:54:57 AM
I did one last week. But it wasn't absolutely awful. But I found it useful to put a bolt back through the the lever pivot point and then use a small screwdriver to lever the piston to the bottom and keep it there. Gives easier access. If the piston is stuck you can try soaking it from both ends and give it a tap.
Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: tom400f on January 16, 2017, 11:03:46 AM
http://www.sohc.co.uk/index.php/topic,4812.msg22283.html#msg22283
http://www.amazon.co.uk/exec/obidos/ASIN/B0034A6B6K

;)

Edit: sorry - just read the holes are no longer there :(
Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: Niko on January 16, 2017, 10:20:02 PM
Giving up on this....I've made a right mess of what's left of the c clip.....but it still won't budge


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Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: paulbaker1954 on January 18, 2017, 11:32:18 PM
My Pistons were completely bug***** couldnt shift the clips and the gudgeon pins were also solid.

Ended up putting them on the milling machine and milled down enough to get the pins and clips free.

Destroyed the pistons and pins but at least saved the rods as I replaced the piston, pins and clips anyway


Brutal but effective

Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: Green1 on January 19, 2017, 08:45:23 AM
Paul that's a big master cylinder  ;D
The 750 might pull up if they were that big.

Tom I had snap ring pliers like those and had to file them down to reach the clip.I gave up and just prize them out with a small screwdriver and pick now
Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: totty on January 20, 2017, 12:53:02 PM
A bit defeatist but is it worth shifting?
The last knackered one I got out just revealed a very corroded bore.
Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: hairygit on January 20, 2017, 12:57:56 PM
A bit defeatist but is it worth shifting?
The last knackered one I got out just revealed a very corroded bore.
Yes, always better to save the conrod, which is why he did it!
Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: paulbaker1954 on January 21, 2017, 12:32:58 AM
Oops sorry misread the post - piston as a master cylinder piston . Now that would boost stopping power🙈🙈🙈
Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: Ashdowner on January 21, 2017, 09:34:24 PM
I found it impossible to get the circlip out even with one of the lugs and it's hole hole intact but took it to my local fixer and he managed to get a very thin sharpened piece of metal in to the hole and slowly prize it out. It must be impossible if both the lugs are broken.
Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: mike the bike on January 21, 2017, 11:35:44 PM
Not impossible.   It's like nailing jelly to the ceiling though.  It took me well over an hour.  The trick is to make the aforementioned sharpened chisel - like screwdrivers dig in to the metal,  prising the circlip out as far as you can, keeping it there while you dig the second one in.  Once the clip is free of the groove,  it's relatively simple.
No, I'm not volunteering to go through that again.
Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: Niko on January 23, 2017, 07:54:26 PM
Not impossible.   It's like nailing jelly to the ceiling though.  It took me well over an hour.  The trick is to make the aforementioned sharpened chisel - like screwdrivers dig in to the metal,  prising the circlip out as far as you can, keeping it there while you dig the second one in.  Once the clip is free of the groove,  it's relatively simple.
No, I'm not volunteering to go through that again.


Oh go on....see if you can beat your personal best time ...
It's a great challenge


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Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: Niko on January 26, 2017, 01:09:39 PM
Not impossible.   It's like nailing jelly to the ceiling though.  It took me well over an hour.  The trick is to make the aforementioned sharpened chisel - like screwdrivers dig in to the metal,  prising the circlip out as far as you can, keeping it there while you dig the second one in.  Once the clip is free of the groove,  it's relatively simple.
No, I'm not volunteering to go through that again.


Oh go on....see if you can beat your personal best time ...
It's a great challenge


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Well it's out....just not so sure if it's buggered it in the process..



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Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: mike the bike on January 26, 2017, 08:14:40 PM
Only took 2 days, well done ;D ;D
Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: Niko on January 26, 2017, 10:23:03 PM
Ended up bashing it out


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Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: mike the bike on January 26, 2017, 10:34:22 PM
Provided inside of the circlip is unscathed, it should be OK,  and with the boot in place as well as the lever, any butchery should be invisible.
Title: Re: Circlip and piston removal ...master cylinder front brake
Post by: Niko on January 27, 2017, 03:13:50 PM
Provided inside of the circlip is unscathed, it should be OK,  and with the boot in place as well as the lever, any butchery should be invisible.


Cheers....


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